css 使用关键帧的简单CSS标头推子

Posted 2021-05-13

<header>
  <div class="panel">

    <span style="display: inline-block; vertical-align: middle; height:100vh;"></span>
    <span style="display: inline-block; vertical-align: middle; ">
      <p class="title">Weshule Educational Services</p>
      <p class="sub-title"><a href="http://webshule.com" target="_blank">The N-Line Project</a></p>

            </div>
            <i class="ion-chevron-down">scroll down</i>
        </header>
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Simple CSS header fader using keyframes
---------------------------------------
This is a simple header fader made with CSS only  by using keyframes animation.
It's sometimes a bit choppy though, no idea how to solve that.

A [Pen](https://codepen.io/Pentest/pen/YxPzBK) by [Oasis Innocent](http://codepen.io/Pentest) on [CodePen](http://codepen.io/).

[License](https://codepen.io/Pentest/pen/YxPzBK/license).

@import url(https://fonts.googleapis.com/css?family=Roboto|Lato|Pacifico|Courgette|Playball|Cookie|Damion);
html, body {
  
    background-position: top center;
    background-attachment: fixed;
    background-color: #fff;
    color: #000;
    font-family: 'Open Sans', sans-serif;
    font-size: 13px;
    overflow-x: hidden;
    margin: 0px;
}
header {
	text-align:center;
	width:100%;
	position:relative;
	height:100vh;
	animation: bgimage 10s ease-in-out infinite alternate;
}

@keyframes bgimage {
  0% {
    background: url("https://static.pexels.com/photos/1702/bow-tie-businessman-fashion-man-large.jpg") center center no-repeat;
    background-attachment: fixed;
    background-size: cover;
  }
  25% {
    background: url("https://static.pexels.com/photos/20967/pexels-photo-large.jpg") center center no-repeat;
    background-attachment: fixed;
    background-size: cover;
  }
  50% {
    background: url("https://static.pexels.com/photos/4097/city-cars-traffic-lights-large.jpeg") center center no-repeat;
    background-attachment: fixed;
    background-size: cover;
  }
  75% {
    background: url("https://static.pexels.com/photos/51415/pexels-photo-51415-large.jpeg") center center no-repeat;
    background-attachment: fixed;
    background-size: cover;
  }
  100% {
    background: url("https://static.pexels.com/photos/2318/vintage-technology-keyboard-old-large.jpg") center center no-repeat;
    background-attachment: fixed;
    background-size: cover;
  }
}

.panel {
  background: rgba(255,255,255,0.4);
  position: relative;
  border: 1px solid rgba(255,255,255,0.1);
  width: 100%;
  height: 100%;
  margin: auto;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  display: table;
}
.panel span p {
  color: rgba(27, 27, 27, 0.5);
    padding: 0px 150px;
  background: -moz-linear-gradient(left,  rgba(255,255,255,0) 0%, rgba(255,255,255,0.5) 25%, rgba(255,255,255,0.5) 75%, rgba(255,255,255,0) 100%);
background: -webkit-linear-gradient(left,  rgba(255,255,255,0) 0%,rgba(255,255,255,0.5) 25%,rgba(255,255,255,0.5) 75%,rgba(255,255,255,0) 100%);
background: linear-gradient(to right,  rgba(255,255,255,0) 0%,rgba(255,255,255,0.5) 25%,rgba(255,255,255,0.5) 75%,rgba(255,255,255,0) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00ffffff', endColorstr='#00ffffff',GradientType=1 );
}
a {
  text-decoration: none;
  color: rgba(27, 27, 27, 0.5);
}
.panel span p.title {
  font-family: 'Damion', sans-serif;
  
  font-size: 40px;
  letter-spacing: 9px;
}

.panel span p.sub-title {
  text-transform: uppercase;
  font-size: 10px;
  padding: 10px 150px;
  letter-spacing: 4px;
  font-weight: bolder;
}

i.ion-chevron-down {
    color: rgba(27, 27, 27, 0.5);
    font-size: 16px;
    bottom: 0px;
    position: absolute;
    left: 0px;
    right: 0px;
    font-style: normal;
    font-variant: small-caps;
    font-weight: bolder;
}
.ion-chevron-down:before {
    display: block !important;
    margin: -36px;
}

i.ion-chevron-down {
  animation: bouncetext .6s cubic-bezier(0.165, 0.840, 0.440, 1.000) infinite alternate;
  animation-delay: 0;
}
@keyframes bouncetext {
  0%{transform: translateY(0px);}
  100% {transform: translateY(-25px);}
} 

section { 
    height: auto;
    width: 75%;
    margin: 0 auto;
    background: rgba(34, 34, 34, 0.07);
    border: 1px solid #DFDFDF;
}
section p {
  font-size: 15px;
  padding: 20px 50px;
}